1.\" 2.\" $FreeBSD: src/share/man/man4/ipfirewall.4,v 1.19.2.7 2002/11/18 21:51:16 luigi Exp $ 3.\" $DragonFly: src/share/man/man4/ipfirewall.4,v 1.5 2007/07/29 16:43:05 swildner Exp $ 4.\" 5.Dd June 22, 1997 6.Dt IPFW 4 7.Os 8.Sh NAME 9.Nm ipfw 10.Nd IP packet filter and traffic accounting 11.Sh DESCRIPTION 12.Nm Ipfw 13is a system facility which allows filtering, 14redirecting, and other operations on IP packets travelling through 15system interfaces. 16.Pp 17The user interface for 18.Nm 19is implemented by the 20.Xr ipfw 8 21program. 22.Sh KERNEL OPTIONS 23The following options in the kernel configuration file are related to 24.Nm 25operation: 26Options in the kernel configuration file: 27.Bl -tag -width ".Cd options IPFIREWALL_VERBOSE_LIMIT" 28.It Cd options IPFIREWALL 29enable 30.Nm 31.It Cd options IPFIREWALL_VERBOSE 32enable firewall logging 33.It Cd options IPFIREWALL_VERBOSE_LIMIT 34limit firewall logging 35.It Cd options IPDIVERT 36enable 37.Xr divert 4 38sockets 39.El 40.Sh SEE ALSO 41.Xr setsockopt 2 , 42.Xr divert 4 , 43.Xr ip 4 , 44.Xr ipfw 8 , 45.Xr sysctl 8 , 46.Xr syslogd 8 47